/Engine/Plugins/Online/OnlineSubsystemSteam/Source/Public/OnlineAuthInterfaceUtilsSteam.h
This delegate dictates the success or failure of an authentication result with an additional flag that explains the result. This is fired at the same time as the above delegate but includes additional data. Should a project be listening to result delegate calls, it is recommended to listen to one of these two (but not both).
typedef TMulticastDelegate_ThreeParams< void, const class [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) &, bool, [ESteamAuthResponseCode](API\Plugins\OnlineSubsystemSteam\ESteamAuthResponseCode) > FOnSteamAuthResultWithCode